Lock.



No. 829,616. PATENTED AUG. 28, 1906.

M. G. WOOD.

LOCK.

APPLICATION FILED AUG. 1. 1904.

2 SHBETSSHEBT 1.

PATENTED AUG. 28, 1906.

M. G. WOOD.

LOCK.

APPLIGATION FILED AUG.1.1904.

2 SHEETSSHEET 2.

Tu: "aunts PETIRI cm. iumnqmn. n. c.

, SQCfiIl ()Iith line 13 13, Fig. 12.

UNITED STATES PATENT oEEIcE.

Specification of Letters Patent.

Patented. Aug. 28, 1906.

Application filed August-1,1904. Serial No. 219,102.

To at ll whfom it may concern:

,Be it knownthat ILMARSHALL GEORGE Woo1j,fa subject of the King of. Great Britain, residing at 5 Charlotte street, Portland Place, London, England, have invented new and, useful Improvements in Locks, of which the following is a specification.

My inventionrelates to looks having protrusible bolts, and has for its objects to simtheir construction, to increase the difficulty of picking or operating them without thq r'ope'r key, and to afford greater resistance than heretofore to attempts to force theJS G- a In a, lock constructed according tomy in- YeIition'I pivot together a number of plates which, eitheralone, or in a stirrup or case in which'they' are carried, form thebolt and also act as tumblers, the saidplates having in or them slots or projections arranged in conjiin'c'tionwith abar or the like fixed to the lock case, so that the longitudinal movement of the bolt can only be efliected when the slots inthe several plates or the several projections is brought into coincidence to correspond with the bar. The plates are sometimes barbeda't' the outer ends to engage with a bar I ,holflfast' inthe S101. into which the bolt is projected.

To enable Imyinvention to be fully underst'oofd,I willdescribe the same by reference td the accompanying drawings, in whic h F gurelis a view of'the lock with the cover p ateor capremoved, the bolt being shown in 35 thereti'acted position and as composed of a numberofplates; and Fig. 2 is a plan' of the 3 and 4 are views similar to Fig; 1 butr'espectively illustrating the bolt partly protriided'and completely protruded. Figs. 5 and dare elevations of two of the plates of the holt detached. Fig, 7 is a sectionalview of alock wherein the boltiscornp'osed of'a series ofplate's pivoted in astirrup or case. Fig. 8 is a seam on the line 8 8, Fig. 7; and Figs. 9 1 Q, a'nd 1 l'are views of the stirrup or case deta'ched. Fig. 12 is a sectional view showing a lockofthe type shown in Figs. 7 to. 11, Fig. 13 is a Figs. 14 15"'are views showing the plates forming the boltlprovided with barbed ends.

In the arrangementofmy device shown in but with i a double-ended bolt.

Figs. 1 to 6, a is the plate of the lock, and b b b b b are the tumbler-plates forming the bolt, and any desired number of which may be used, according to requirements. The several plates, which are of substantially the same shape externally, are all connected together by the pivot-pin c, (advantageously fixed to the lowermost plate,) and each plate is provided with a spring (1, which presses against a pin e on the lock-plate a. Each plate has formed in it two transverse parallel slots f f f connected by a longitudinal slot 9, and to the lock-plate a is fixed the bar h, which is either in the slots f or in the slots, according as the bolt is in its retracted or protruded position. i V v The positions of the connecting-slots gg in the several plates are varied so that looking projections g of different lengths are formed between the slots f and f, and in order to bring the severalplates into positionto permitof their moving'rel'atively with the bar it to be protruded from the lock they must be lifted to different heights-for instance, as

shown in Fig. 3the key being of course'cut accordingly. Z 1

.Oneor moreof the plates 6 b, &c., is advantageously provided with a notch or gateway, such as that'shownat i in Fig. 6, to allow of the key moving the bolt longitudinally.

' From the foregoing description it will'be noticedthatwhile the plates 1) I), &c., serve as the tumblers of thelock they alsoserve as the bolt, and thus enable a lock Of a certain class to be constructed with fewer parts than a similar lock as heretofore constructed. i is the pintle or pin of the lock, andj is the key,

;In the arrangement hereinbefore deseribed the slot in the case through which the bolt protrudes has to be made rather longer than the width of the said plates in order to allow of the oscillation of the latter, as will be readily understood by" reference to Figs. 1 and 2. By'mounting the said plates in a stirrup or sheath k, as indicated in Figs. 7 and 8, whichsheath is made sufiiciently wide to allow the oscillation. of the tumbler-plates within it, this difiiculty is overcome, the

width of the sheath corresponding with the length of the slot. In this modification the sheath has no oscillation whatever, it being vguided at one end in the slot in the case and at the other end on the bar h also the pin 0, upon which the plates oscillate being carried at both ends in the stirrup, need not be fixed, as it is made of a length corresponding to the distance between the cover and the faceplate of the lock and, furthermore, this arrangement of the pin 0 greatly facilitates the assembling of the parts of the lock.

I sometimes make the sheath 7c with the sides partially closed, and also both ends, if desired-as shown, for instance, in Figs. 12 and 13. This arrangement is of especial advantage in a cupboard lock of the kind wherein either end of the bolt can be used, according as to whether the lock is applied to a right or left hand door.

As shown in Fig. 7, the sprin s cl d take their bearing against the walls of the ca or cover-plate, while in Fig. 12 they ear against the inside of the sheath, as indicated at d whereby the friction and wear due to the sliding of the sprin sis obviated.

The arrangement wierein the ends of the plates are barbed is illustrated in Figs. 14 and 15,- Z Z indicating the barbs, and m slots adjacent thereto and which pass over the holdfast or bar it, inserted into the slot or staple into which the bolt is protruded. The barbs Z Z and slots m are so arranged that when the bolt is to be moved the several barbs will coincide, as shown in Fig. 14, so that the slot min the bolt will pass over the holdfast it, but that when the bolt is shot the several barbs will be in varying positions, one of the barbs of each plate engaging with the holdfast, as indicated in Fig. 15. When this arran ement of barbs is used, the slots f f and g, ereinbefore described, may be disensed with or the barbs may be used in combination with such an arrangement, so that the bolt when shot is locked against backward movement partly by the bar h and partly by the holdfast n.

I wish it understood that I do not confine my invention to the details of construction hereinbefore described, as it is obvious that these can be modified. For instance, the bar h instead of being fixed to the plate a can be fiXed to the cap of the lock, or it may be ailapted to engage with both the cap and the ate. p Having now fully described and ascertained my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In a lock, the combination with the lock-casing, of a sliding bolt, comprising a lurality of plates arranged side by side and aving portions projecting through an aperture in the lock-casing, a pivotal pin connecting said plates for joint longitudinal movement but permitting them to oscillate independently on said pin, said plates having locking projections of different lengths for engaging a locking part adapted to hold said bolt from longitudinal movement, and having key-engaging portions, whereby said plates may be oscillated on'said pivotal pin to bring said locking projections into alinement to pass said locking part and independent springs engaging said plates, substantially as described.

2. In a lock, the combination with the loclccasing, of a longitudinally-sliding bolt comprising a plurality of plates arranged side by side and adapted to be protruded through an aperture in said casing, a pivotal pin uniting 'said plates for joint longitudinal movement but permitting them to oscillate independently thereon, a fixed locking-bar secured in said lock-casing, said plates being provided with looking projections of difierent lengths to engage said locking-bar and prevent the longitudinal movement of the bolt, and having key-engaging portions, and independent springs for said plates for holding them normally in engagement with said fixed lockingbar, whereby said plates may be oscillated more or less upon said pivotal pin to bring said locking projections into alinement to permit them to pass said locking-bar, substantially as described.

3. In a lock, the combination with the lock-casing, of a longitudinally-sliding bolt comprising a plurality of plates arranged side by side and adapted to be protruded through an aperture in said casing, a pivotal pin uniting said plates for joint longitudinal movement but permitting them to oscillate independently thereon, a fixed locking-bar secured in said lock-casing, said plates being each provided with a pair of parallel slots extending transversely thereof and connected by a longitudinal slot, said longitudiby side, a sheath inclosing said plates and adapted to be protruded therewith through an aperture in said casing, a pivotal pin uniting said lates and said sheath for joint longitudinal movement, but permitting said plates to oscillate independently thereon, said pivotal pin being prevented from moving longitudinally by the walls of said casing, a fixed locking-bar secured in said lock-casing, said plates being provided with locking projections of different lengths to engage .said' upon said pivotal pin to bring saidlocking prolockingbar and prevent the longitudinal jeetions into alinement to permit them to pass movement of the bolt, and having key -ensaid locking-bar, substantially as described. gaging portions, and independent springs for MARSHALL GEORGE WOOD.

3 said plates for holding them normally in en- Witnesses:

gagement with said fixed looking-bar, where- JOHN E. BOUsFIELD, by said plates may be oscillated more or less C. G. REDFERN. 

